var hexcase = 1;
var b64pad = "";
var chrsz = 8;
var mode = 32;

function preprocess(form)
{
  var str = "";
  str += form.verifycode.value;
  str = str.toUpperCase();
  form.p.value = md5(md5_3(form.p.value)+str);
  return true;
}

function md5_3(s)
{
  var tmp = new Array;
  tmp = core_md5(str2binl(s), s.length * chrsz);
  tmp = core_md5(tmp, 16 * chrsz);
  tmp = core_md5(tmp, 16 * chrsz);
  return binl2hex(tmp);
}

function md5(s)
{
  return hex_md5(s);
}
function hex_md5(s)
{
  return binl2hex(core_md5(str2binl(s), s.length * chrsz));
}

function b64_md5(s)
{
  return binl2b64(core_md5(str2binl(s), s.length * chrsz));
}

function str_md5(s)
{
  return binl2str(core_md5(str2binl(s), s.length * chrsz));
}

function hex_hmac_md5(key, data)
{
  return binl2hex(core_hmac_md5(key, data));
}

function b64_hmac_md5(key, data)
{
  return binl2b64(core_hmac_md5(key, data));
}

function str_hmac_md5(key, data)
{
  return binl2str(core_hmac_md5(key, data));
}

function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

function core_md5(x, len)
{
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a = 1732584193;
  var b =  - 271733879;
  var c =  - 1732584194;
  var d = 271733878;

  for (var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i + 0], 7,  - 680876936);
    d = md5_ff(d, a, b, c, x[i + 1], 12,  - 389564586);
    c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
    b = md5_ff(b, c, d, a, x[i + 3], 22,  - 1044525330);
    a = md5_ff(a, b, c, d, x[i + 4], 7,  - 176418897);
    d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
    c = md5_ff(c, d, a, b, x[i + 6], 17,  - 1473231341);
    b = md5_ff(b, c, d, a, x[i + 7], 22,  - 45705983);
    a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
    d = md5_ff(d, a, b, c, x[i + 9], 12,  - 1958414417);
    c = md5_ff(c, d, a, b, x[i + 10], 17,  - 42063);
    b = md5_ff(b, c, d, a, x[i + 11], 22,  - 1990404162);
    a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
    d = md5_ff(d, a, b, c, x[i + 13], 12,  - 40341101);
    c = md5_ff(c, d, a, b, x[i + 14], 17,  - 1502002290);
    b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);

    a = md5_gg(a, b, c, d, x[i + 1], 5,  - 165796510);
    d = md5_gg(d, a, b, c, x[i + 6], 9,  - 1069501632);
    c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
    b = md5_gg(b, c, d, a, x[i + 0], 20,  - 373897302);
    a = md5_gg(a, b, c, d, x[i + 5], 5,  - 701558691);
    d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
    c = md5_gg(c, d, a, b, x[i + 15], 14,  - 660478335);
    b = md5_gg(b, c, d, a, x[i + 4], 20,  - 405537848);
    a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
    d = md5_gg(d, a, b, c, x[i + 14], 9,  - 1019803690);
    c = md5_gg(c, d, a, b, x[i + 3], 14,  - 187363961);
    b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
    a = md5_gg(a, b, c, d, x[i + 13], 5,  - 1444681467);
    d = md5_gg(d, a, b, c, x[i + 2], 9,  - 51403784);
    c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
    b = md5_gg(b, c, d, a, x[i + 12], 20,  - 1926607734);

    a = md5_hh(a, b, c, d, x[i + 5], 4,  - 378558);
    d = md5_hh(d, a, b, c, x[i + 8], 11,  - 2022574463);
    c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
    b = md5_hh(b, c, d, a, x[i + 14], 23,  - 35309556);
    a = md5_hh(a, b, c, d, x[i + 1], 4,  - 1530992060);
    d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
    c = md5_hh(c, d, a, b, x[i + 7], 16,  - 155497632);
    b = md5_hh(b, c, d, a, x[i + 10], 23,  - 1094730640);
    a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
    d = md5_hh(d, a, b, c, x[i + 0], 11,  - 358537222);
    c = md5_hh(c, d, a, b, x[i + 3], 16,  - 722521979);
    b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
    a = md5_hh(a, b, c, d, x[i + 9], 4,  - 640364487);
    d = md5_hh(d, a, b, c, x[i + 12], 11,  - 421815835);
    c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
    b = md5_hh(b, c, d, a, x[i + 2], 23,  - 995338651);

    a = md5_ii(a, b, c, d, x[i + 0], 6,  - 198630844);
    d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
    c = md5_ii(c, d, a, b, x[i + 14], 15,  - 1416354905);
    b = md5_ii(b, c, d, a, x[i + 5], 21,  - 57434055);
    a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
    d = md5_ii(d, a, b, c, x[i + 3], 10,  - 1894986606);
    c = md5_ii(c, d, a, b, x[i + 10], 15,  - 1051523);
    b = md5_ii(b, c, d, a, x[i + 1], 21,  - 2054922799);
    a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
    d = md5_ii(d, a, b, c, x[i + 15], 10,  - 30611744);
    c = md5_ii(c, d, a, b, x[i + 6], 15,  - 1560198380);
    b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
    a = md5_ii(a, b, c, d, x[i + 4], 6,  - 145523070);
    d = md5_ii(d, a, b, c, x[i + 11], 10,  - 1120210379);
    c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
    b = md5_ii(b, c, d, a, x[i + 9], 21,  - 343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  if (mode == 16)
  {
    return Array(b, c);
  }
  else
  {
    return Array(a, b, c, d);
  }
}

function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}

function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}

function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}

function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}

function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if (bkey.length > 16)
    bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for (var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512+data.length * chrsz);
  return core_md5(opad.concat(hash), 512+128);
}

function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

function bit_rol(num, cnt)
{
  return (num << cnt) | (num  >>> (32-cnt));
}

function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for (var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32);
  return bin;
}

function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for (var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i >> 5] >>> (i % 32)) & mask);
  return str;
}

function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";

  for (var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8+4)) & 0xF) +
      hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF);
  }
  return str;
}

function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for (var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16) | ((
      (binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8) | ((binarray[i
      + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
    for (var j = 0; j < 4; j++)
    {
      if (i * 8+j * 6 > binarray.length * 32)
        str += b64pad;
      else
        str += tab.charAt((triplet >> 6 * (3-j)) & 0x3F);
    }
  }
  return str;
}